Mexican-American War

(1846-1848) Conflict after US annexation of Texas; Mexico still considered Texas its own; Victor: US; granted all land from Texas to California (minus the Gadsden Purchase) in the Treaty of Guadalupe Hidalgo

Lecompton Constitution

Ostend Manifesto

(1854) By American officials; a secret memo that urged the acquisition of Cuba by any means necessary. Once out, Northerners believed it was an attempt to extend slavery, thus the manifesto was disavowed